Tapjoy is fairly popular and also ties in really well with in-app purchases (as tapjoy can award the user your virtual currency for completing ad-related tasks (such as completing surveys, downloading and running apps or making purchases)

You can also use tapjoy to market your game (Then players of games like Dawn of Dragons can earn in game currency for that game if they download and try your game(You can even require them to for example complete level X in your game before they get their reward giving you a decent shot at getting them hooked as well (+ you only have to pay for the users who actually complete the specified action))

Edited by SimonForsman, 12 June 2013 - 06:31 AM.

I don't suffer from insanity, I'm enjoying every minute of it.The voices in my head may not be real, but they have some good ideas!